This use case is too obvious that it might not be obvious to cast it as a
use case, but I'll try.
** ETRI-UC1: Filling the holes of OWL
When building ontologies using OWL, we usually come up with such relations
or classes that are difficult or impossible to express in OWL, which creates
vocabulary holes in the ontologies. The most representative hole is the set
of relations that can be defined by chained properties[1][2]. For example,
with OWL alone, you cannot describe "uncle" relation, which is the
composition of "father" and "brother" relation, into the family ontology.
With rules, it's trivial to describe the relations defined by chained
properties. As such, RIF will be an essential semantic web language that
complements and extends OWL.
[1] OWL Web Ontology Language Use Cases and Requirements, W3C Recommendation
10 Feb 2004
[2] Benjamin N. Grosof, Ian Horrocks, Raphael Volz, and Stefan Decker.
Description logic programs: Combining logic programs with description logic.
In Proc. of the Twelfth International World Wide Web Conference (WWW 2003),
pages 48-57. ACM, 2003.
Regards,
Minsu
----------
Minsu Jang
Senior Researcher
Intelligent Robot Research Division
Electronics & Telecommunications Research Institute
Phone: +82-42-860-1250 Fax: +82-42-860-6790
** Bossam Rule Engine: http://mknows.etri.re.kr/bossam/ **